JP2715804B2 - Automatic performance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic musical instrument such as a sequencer of an electronic musical instrument, an automatic accompaniment apparatus or an automatic rhythm musical instrument, and more particularly to an automatic musical instrument having a tempo changing function capable of arbitrarily changing the tempo during automatic performance. .

[0002]

2. Description of the Related Art A conventional automatic performance device is of a sequencer type that stores performance information input from a keyboard or a computer of an electronic musical instrument and reproduces performance sounds based on the stored performance information. is there. In this type of automatic performance apparatus, performance information is read from a memory according to a tempo clock, and a tone signal is generated based on the performance information. In this case, the frequency of the tempo clock can be freely variably controlled by a tempo setting switch or the like.
The operator can freely change the performance tempo during reproduction to a desired one by operating the tempo setting switch and the like.

The value of the performance tempo can be changed continuously by operating a tempo setting switch, or can be changed discontinuously by operating an appropriate up / down switch. Also, recently, the operator operates a switch (such as a ritardand mode switch or an accelerand mode switch) corresponding to a speed slogan (such as a ritardand or an acceleland mode) so that the playing tempo is automatically gradually reduced at a predetermined rate. And faster.

On the other hand, in an automatic rhythm performance of an electronic musical instrument, a plurality of rhythm patterns are prepared for a common rhythm name, and an operator can select a desired rhythm pattern from the rhythm patterns. For example, a normal pattern (main pattern) and a variation pattern (sub-pattern) are prepared in advance for the rhythm name of Bossa Nova in the electronic musical instrument, and the operator can select it. The number of variation patterns is not limited to one, and a plurality of variation patterns may be prepared. Generally, these patterns have a length of one to several measures, and the electronic musical instrument executes a continuous automatic rhythm playing process by repeatedly playing these patterns.

[0005] The electronic musical instrument repeatedly performs the rhythm pattern selected in this manner. Since the same rhythm pattern is repeatedly performed, the musical piece is given a monotonous feeling as a whole. Having. Therefore, in recent electronic musical instruments, a plurality of sub-patterns called fill-in, break or ad-lib are prepared, and a performance according to this sub-pattern is temporarily executed in response to an artificial instruction by an operator's switch operation or the like. And
After the sub-pattern performance, the process returns to the main rhythm pattern performance again.

[0006]

A conventional automatic performance device performs an operation of changing a performance tempo during a performance by a tempo setting operator such as a knob or a switch.
By changing the performance tempo continuously or smoothly, or by appropriately changing the rhythm pattern by fill-in or the like, the tempo and rhythm of the performance music are variously changed, and the performance music is given a flurry. However, the conventional automatic performance device changes the performance tempo and changes the rhythm pattern separately. It was not possible to perform an operation such as returning to (tempo).

[0007] Some conventional automatic performance devices synchronize the ritard-and-process with the fill-in and treat the ritard-and-process as effective only during the fill-in performance, and gradually reduce the performance tempo only during the fill-in performance. Some perform an operation of returning the performance tempo to the tempo before the ritardando processing at the same time as the end of the fill-in performance (a tempo). However, this cannot perform the ritardando processing alone without synchronizing the fill-in processing and the ritardando processing, and cannot perform the fill-in processing in the middle of the ritardando processing, so that the performance is narrow. There is a problem that.

The present invention has been made in view of the above points, and includes a tempo change process for changing a performance tempo such as a ritardand process and an accelerand process, and a subroutine for converting a performance pattern from a normal pattern such as a fill-in performance. It is an object of the present invention to provide an automatic performance device that can separately execute a pattern change process for changing a pattern and can also execute the process in synchronization.

[0009]

An automatic performance device according to the present invention includes a performance pattern storage means for storing a plurality of main patterns and a plurality of sub-patterns, wherein the sub-pattern is stored during automatic performance according to the main pattern. Pattern change instructing means for instructing temporary insertion of an automatic performance corresponding to the tempo signal, tempo signal generating means for generating a tempo signal, and tempo change instructing means for instructing to change the speed of the tempo signal. A tempo change control means for gradually changing the speed of the tempo signal generated by the tempo signal generation means to a predetermined speed at a predetermined change rate in accordance with an instruction from the tempo change instruction means; The main pattern is read from the performance pattern storage means, and an automatic performance corresponding to the read main pattern is performed in response to the tempo signal.
The sub-pattern is read from the performance pattern storage unit in accordance with an instruction from the pattern change instruction unit, and an automatic performance corresponding to the read sub-pattern is temporarily performed at a tempo corresponding to the tempo signal. Control means for performing automatic performance according to the main pattern again at the tempo according to the tempo signal after completion of the automatic performance by the sub-pattern; and automatic performance processing of the sub-pattern by the control means and the tempo change control means. In the case where the tempo signal change processing is executed simultaneously, if the tempo change control is not completed at the end of the performance of the sub-pattern, the tempo signal is synchronized with the end of the automatic performance processing of the sub-pattern. To restore the original tempo signal speed before the change process to the sub-pattern If the tempo change control at the time of playing the end of the emission is completed are those composed of a tempo return means for maintaining the current state of the tempo signal.

[0010]

The pattern change instructing means is a person who instructs to temporarily insert an automatic performance according to the sub-pattern during the automatic performance according to the main pattern. The tempo change instructing means instructs to change the speed of the tempo signal generated by the tempo signal generating means. The tempo change control means gradually changes the speed of the tempo signal generated by the tempo signal generation means to a predetermined speed at a predetermined change rate in accordance with an instruction from the tempo change instruction means.

The control means reads the main pattern from the performance pattern storage means and performs an automatic performance according to the read main pattern at a tempo according to a tempo signal. Therefore, by giving an instruction to change the speed of the tempo signal by the tempo change instructing means during the automatic performance according to the main pattern, it is possible to say that the tempo at that time is changed. The control means reads the sub-pattern from the performance pattern storage means in accordance with an instruction from the pattern change instructing means , and temporarily performs an automatic performance according to the read sub-pattern at a tempo according to a tempo signal. After the automatic performance by the pattern is completed, the automatic performance according to the main pattern is performed again at the tempo according to the tempo signal.

Therefore, the tempo at that time can be changed by instructing the tempo change instructing means to change the speed of the tempo signal when the control means is performing the automatic performance according to the sub-pattern. Also,
Tempo change control means gradually changes the speed of the tempo signal generated by the tempo signal generation means to a predetermined speed at a predetermined change rate.
When performing the control for changing the pattern, the pattern change instruction means instructs the temporary insertion of the automatic performance corresponding to the sub-pattern during the automatic performance corresponding to the main pattern, thereby controlling the pattern change instruction. The sub-pattern is read from the performance pattern storage means in accordance with an instruction from the means, and an automatic performance corresponding to the read sub-pattern can be temporarily performed at a tempo corresponding to a changing tempo signal. Such a case corresponds to the case where the automatic performance processing of the sub-pattern and the processing of changing the tempo signal by the tempo change control means are executed simultaneously, so that the tempo return means controls the tempo change control at the end of the performance of the sub-pattern. If the processing of the sub-pattern is not completed, the processing of returning the speed of the tempo signal to the original tempo signal before the change processing is performed in synchronization with the end of the automatic performance processing of the sub-pattern. If the tempo change control has been completed at the end, the current tempo signal is maintained without performing the process of returning to the original tempo signal speed.

That is, in the automatic performance device according to the present invention, the pattern change instructing means and the tempo change instructing means exist independently of each other, and the pattern changing process and the tempo changing process operate separately in a normal operation. Only when the automatic performance processing of the sub-pattern by the control means and the change processing of the tempo signal by the tempo change control means are executed simultaneously, the tempo signal is synchronized with the end of the automatic performance processing of the sub-pattern. Since the speed is returned to the original tempo signal speed before the change process, tempo change process that changes the performance tempo such as ritardando process or accelerand process, and performance pattern such as fill-in performance etc. It is also possible to separately execute the pattern change process for changing from the normal pattern to the sub pattern In addition, there is an effect that both processes can be executed in synchronization. Also, the tempo signal
To return the speed of the signal to the original tempo signal speed before the change process
Process (tempo return processing) at the end of the performance of the sub-pattern
Synchronization is not always performed,
The tempo change control has ended
Automatically, the tempo change
Process can be automatically synchronized with the pattern change process.
Tempo change control that prioritizes the player's operation intentions
Has an excellent effect that it can be performed automatically.
You. That is, the tempo changes before the end of the sub-pattern performance.
If control has been completed, it is already in a stable state
The current tempo is performed by operating the tempo change instruction means.
Assuming that the player has the desired tempo,
Forcibly change the current tempo to the original tempo before the change process.
It is configured not to return to. By this
For the player, the tempo change control is
Without worrying more than necessary
Change control (ritardand processing and acceleland processing)
Can be used easily. This also
Thus, the performance expression range can be extended.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a block diagram of a hardware configuration showing an embodiment of an electronic musical instrument to which the automatic performance device according to the present invention is applied. In this embodiment, a CPU 10, a program ROM 11, a data and a working RAM 1
Various processes are executed under the control of the microcomputer including the CPU 2.

Microprocessor unit (CPU) 1
0 controls the operation of the entire electronic musical instrument.
A data and address bus 18 is provided to the CPU 10.
ROM 11, data and working RAM 12, key press detection circuit 13, switch detection circuit 1
4, display circuit 15, sound source circuit 16 and timer 17 are connected. The program ROM 11 stores a system program of the CPU 10, automatic performance pattern data, and various parameters and various data related to musical sounds.
It is composed of a read only memory (ROM). The data and working RAM 12 stores performance information and CPU 1
Numeral 0 temporarily stores various data generated when the program is executed, and predetermined address areas of a random access memory (RAM) are respectively allocated and used as registers and flags.

The keyboard 19 has a plurality of keys for selecting the pitch of a musical tone to be produced, has key switches corresponding to each key, and has a pressing force detecting device and the like as necessary. Touch detection means. The keyboard 19 is a basic operation element for music performance, and it goes without saying that other operation elements may be used. Key press detection circuit 13
Includes a key switch circuit provided corresponding to each key of the keyboard 19 for designating a pitch of a musical tone to be generated. The key press detection circuit 13 detects a change of the keyboard 19 from the key release state to the key press state and outputs a key-on event, and detects a change from the key press state to the key release state and outputs a key-off event. At the same time, a key code indicating the pitch of the key for each key-on event and key-off event is output. In addition, the key press detection circuit 13 determines the key press operation speed or the press force when the key is pressed down, generates touch data, and outputs the touch data as velocity data. A computer or the like may be connected in place of the key press detection circuit 13 and the keyboard 19 to input desired performance information.

The switch detection circuit 14 is provided corresponding to each of the operators (switches) provided on the panel switch 20, and outputs operation data corresponding to the operation status of each of the operators as event information. . The panel switch 20 includes various operators for selecting, setting, and controlling the tone color, volume, pitch, effect, and the like of a musical tone to be generated, and has the following switches. A start / stop (START / STOP) switch 2A is a switch for instructing start and stop of accompaniment. A fill-in (FILL IN) switch 2B is a switch for instructing the start of a fill-in performance. Synchro (SYNC.)
The switch 2C is a switch for instructing whether to start the change of the tempo of the ritardando or accelerando in synchronization with the bar timing.

A ritardando (RIT.) Switch 2D is a switch corresponding to the ritardando of the speed slogan that gradually lowers the current performance tempo. The accelerando (ACC.) Switch 2E is a switch corresponding to accelerand of the speed slogan for gradually increasing the current performance tempo. The tempo up switch 2F and the tempo down switch 2G are switches for instructing the speed of the performance tempo. This electronic musical instrument uses this switch 2
By operating F or 2G, the performance tempo can be increased or decreased. In addition to the panel switch 20, there are various switches such as a tone selection switch for specifying the tone of the performance sound and a style selection switch for specifying a performance style such as waltz or bossa nova. Then, it is omitted for convenience of explanation.

The display circuit 15 displays various kinds of information such as the control state of the CPU 10 and the contents of setting parameters on the display unit 21, and displays, for example, a tone color name and an envelope shape. The display unit 21 is composed of a liquid crystal display panel (LCD), and its display operation is controlled by the display circuit 15. The display unit 21 may be of a format for displaying all the contents of the currently set parameters, or of a format for displaying only changed parameters.

The tone generator 16 is capable of simultaneously generating musical tone signals on a plurality of channels. The tone generator 16 receives data and performance information (data conforming to the MIDI standard) given via an address bus 18 and receives the data. The tone signal is generated based on Any tone signal generation method may be used in the tone generator 16. For example, a memory reading method for sequentially reading out musical tone waveform sample value data stored in a waveform memory according to address data that changes in accordance with the pitch of a musical tone to be generated, or a method in which the address data is used as phase angle parameter data at a predetermined frequency A known method such as an FM method for performing a modulation operation to obtain musical tone waveform sample value data, or an AM method for performing a predetermined amplitude modulation operation using the above address data as phase angle parameter data to obtain musical sound waveform sample value data. You may employ suitably. A tone signal generated from the tone generator 16 is transmitted to a sound system 2 including an amplifier and a speaker (not shown).
2 is pronounced.

The timer 17 generates a tempo clock pulse for setting the tempo of the automatic performance.
It can be set and adjusted by the upper tempo setting switch (not shown). The tempo clock pulse is given to the CPU 10 as an interrupt command, and the CPU 10 executes an automatic performance process by an interrupt process.

The following register groups are prepared in the data and working RAM 12 and are used in various processes described later. RUN: A running flag which is sequentially rewritten by operating the start / stop switch 2A of the panel switch 20, when "1" indicates that the current mode is the automatic performance mode, and when "0", it is in the stopped state. Is shown.

COUNT: a timing counter indicating the performance position within one bar as timing data. FILL: Fill-in switch 2 of panel switch 20
A fill-in flag that is sequentially rewritten by the operation of B. A value of "1" indicates that the fill-in performance is being performed by the fill-in pattern, and a value of "0" indicates that the normal performance is being performed by the normal pattern. SYNC: Sync switch 2C of panel switch 20
Is a synchro mode flag that is sequentially rewritten by the operation of "1", indicating that the start of tempo change of ritardando or accelerand is performed in synchronization with the bar line timing at "1", and such synchronized performance is performed at "0". Indicates no.

TMM: "1" is set when the ritard switch 2D of the panel switch 20 is operated,
"0" when accelerando switch 2E is operated
Is set to "1", which indicates that the current performance tempo mode is the ritardando mode, and "0" indicates that the current performance tempo mode is the acceleland mode. NEXT: In the synchro mode (SYNC = 1), “1” is set when the retard switch 2D of the panel switch 20 is operated, “2” is set when the accelerand switch 2E is operated, and “0” otherwise. Is set in the tempo mode change flag. The tempo mode change flag NEXT indicates that the performance tempo mode is changed to the ritardando mode in synchronism with the next bar line timing when "1", and the performance is synchronized in synchronism with the next bar line timing when "0". Indicates that the tempo is changed to Accelerando mode. TCC: a tempo change counter for storing a time corresponding to the ritardand mode or the acceleland mode. When this tempo change counter TCC stores a value other than "0", it indicates that the performance tempo mode is the ritardando mode or the acceleland mode, and when "0" is stored, the tempo does not change. It is also used as a tempo mode flag indicating a normal performance tempo mode.

Next, a microcomputer (CPU 1
An example of the processing performed by the automatic performance device according to step (0) will be described with reference to the flowcharts of FIGS. FIG.
FIG. 3 is a diagram showing an example of a main routine processed by a microcomputer. First, when the power is turned on, the CPU
10 starts processing according to the control program stored in the program ROM 11. In the “initialize” process, data and various registers and flags in the working RAM 12 are initialized. After performing a predetermined "initialization" process, the switch detection circuit 14 is scanned to detect the presence / absence of a switch-on event. If an event is present (YES), a "corresponding switch process" corresponding to the event is executed. If there is no event (NO), “other processing” is executed.

That is, as a result of scanning the switch detection circuit 14, in particular, the start / stop switch 2A,
Fill-in switch 2B, Synchro switch 2C, Rital dand switch 2D, Accelerand switch 2E
It detects whether or not a switch event has occurred, and if a switch event is detected, executes various event processes corresponding to the detected switch event. An example of this “corresponding switch process” is shown in FIGS.
Is shown in In "other processing", processing based on the operation of other operators on the panel switch 20,
Various other processes, such as a change in volume and a process of playing on the keyboard 19, are performed.

FIG. 3 shows one of the processes in the "corresponding switch process" of FIG.
It is a figure showing an example of “start / stop processing” performed when is operated. First, in "start / stop processing", the state of the traveling flag RUN at the time of operating the start / stop switch 2A is determined, and processing according to the state is executed. When the running flag RUN is "0" (Y
In the case of ES), since the automatic performance was stopped before this, the pointer is set to the head address of the normal pattern in preparation for the automatic performance. Then, the timing counter COUNT is reset, and the running flag RUN is set.
Is set to "1" and the routine returns. Conversely, if the running flag RUN is "1" (NO), the automatic performance running state was set before that, so the running flag RUN is reset to stop the automatic performance, and the routine returns.

FIG. 4 is a diagram showing one example of the “corresponding switch process” of FIG. 2 and an example of the “fill-in process” performed when the fill-in switch 2B is operated. First, in the “fill-in processing”, the state of the fill-in flag FILL when the fill-in switch 2B is operated is determined, and processing according to the state is executed. If the fill-in flag FILL is "1" (YES), it means that the fill-in performance was performed before the operation of the fill-in switch 2B, so that in preparation for the normal performance processing to be performed, the normal pattern is generated based on the timing counter COUNT. Is searched for (the timing within one bar), and the address of the normal pattern corresponding to the current position is set in the pointer. And
The fill-in flag FILL is reset to “0” and the process returns. That is, when the fill-in switch 2B is pressed during the fill-in performance, the fill-in performance is immediately stopped, and the normal performance is performed.

Conversely, the fill-in flag FILL is set to "0".
In the case of (NO), it means that the normal performance was performed before the operation of the fill-in switch 2B. Therefore, in preparation for the next fill-in performance processing, the current position (in one bar) in the fill-in pattern is determined based on the timing counter COUNT. ), And the address of the fill-in pattern corresponding to the current position is set in the pointer. Then, the fill-in flag FILL is set to "1" and the routine returns.

FIG. 5 shows one example of the "corresponding switch process" of FIG. 2, and shows an example of the "sync process" performed when the sync switch 2C is operated. In this “sync processing”, the sync switch 2C
The sync mode flag SYNC is inverted every time the operation is performed.

FIG. 6 shows one example of the "corresponding switch process" of FIG. 2, and is an example of the "ritard process" performed when the ritard switch 2D is operated. First, in the “retarding process”, the state of the synchro mode flag SYNC at the time of operating the retard switch 2D is determined, and a process corresponding to the state is executed. When the sync mode flag SYNC is "0" (N
In the case of O), which means that the synchronized performance is not performed, a predetermined value (for example, a value for two measures) corresponding to the ritardando performance time is set in the tempo change counter TCC. Then, the tempo mode flag TMM is set to "1" to indicate that the subsequent tempo mode is the ritard mode. In preparation for the next a-tempo processing, the current tempo value at the time of operating the ritard switch 2D is stored and the routine returns. Conversely, if the sync mode flag SYNC is "1" (YES), the tempo mode change flag N is changed to change the performance tempo mode to the ritard mode in synchronization with the next bar line timing.
EXT is set to "1" and the routine returns.

FIG. 7 is a diagram showing one example of the "corresponding switch process" of FIG. 2, and is an example of the "accelerand process" performed when the acceler land switch 2E is operated. First, "Acchelerland processing"
In the state, the state of the synchro mode flag SYNC at the time of operating the acceler land switch 2E is determined, and a process corresponding to the state is executed. Synchro mode flag SYN
When C is "0" (NO), it means that the synchronized performance is not performed, so that the tempo change counter TCC stores a predetermined value (for example, 2) corresponding to the acceleland performance time.
Set the value for the bar). The tempo mode flag TMM is set to "0" to indicate that the subsequent tempo mode is the acceleland mode. In preparation for the next a-tempo processing, the current tempo value at the time of operating the accelerland switch 2E is stored and the routine returns. Conversely, the synchronization mode flag SYNC is set to “1” (YES)
In the case of, the tempo mode change flag NEXT is set to "2" to change the performance tempo mode to the acceleland mode in synchronization with the next bar line timing, and the routine returns.

FIGS. 8 and 9 are diagrams showing the details of the "timer interrupt processing" executed by the CPU 10 in response to an interrupt instruction (tempo clock) from the timer 17. FIG. In this “timer interrupt processing”, first, it is determined whether or not the running register RUN is “1”, and “1” (YE
Only in the case of S), the interrupt processing is executed and "0"
In the case of (NO), it returns immediately. Hereinafter, the contents of each step will be described.

Step 31: Running flag RUN is "1"
It is determined whether or not the automatic performance mode is set. If YES, the process proceeds to the next step 32, and if NO, the process returns. Step 32: The accompaniment pattern data is read from the ROM 11 based on the timing value stored in the timing counter COUNT and output to the tone generator circuit 16. Step 33: It is determined whether or not the value stored in the tempo change counter TCC is "0", and "0" (YES)
In the case of, it means that the current tempo mode is the normal tempo mode in which the tempo change process is not performed, so that the process jumps to step 38 in order to omit the processes of steps 34 to 37, and when the value is other than "0". Since the current tempo mode is the tempo change mode, the process proceeds to the next step to perform processing corresponding to the tempo change mode.

Step 34: Since the tempo change counter TCC is determined to be a value other than "0" in the previous step 33, the tempo change counter TCC is decremented by one here. Step 35: It is determined whether or not the value stored in the tempo mode flag TMM is "1". If the value is "1" (YES), the process proceeds to Step 36. If the value is "0" (NO), the process proceeds to Step 37. move on.

Step 36: Tempo mode flag TMM
Since the value stored in is "1", the ritardund process for lowering the tempo by a predetermined value is performed. Step 37: Since the value stored in the tempo mode flag TMM is "0", an accelerand process for increasing the tempo by a predetermined value is performed.

Step 38: Timing counter COU
Whether the value stored in NT is equal to the maximum value MAX corresponding to the time for one bar, that is, if the quarter note is 24
When the time signature of the music piece is 4/4, the value of the timing counter COUNT is set to the maximum value MAX =
95, and if the time signature is 3/4, it is determined whether the value of the timing counter COUNT is the maximum value MAX = 71. If they are not equal (NO), the process proceeds to step 39 and is equal (YES). ) If step 40
Proceed to. That is, if YES is determined here, it means the bar timing. Step 39: Since the value stored in the timing counter COUNT is not the maximum value, here, the value of the timing counter COUNT is incremented by 1 and the process returns.

Step 40: Fill-in flag FILL
It is determined whether the value stored in is “1” or not, and “1”
In the case of (YES), the process proceeds to the next step 41, where "0" is set.
In the case of (NO), step 45 in FIG.
Jump to Step 41: reset the fill-in flag FILL.

Step 42: Tempo change counter T
Determine whether the value stored in CC is "0",
In the case of “0” (YES), it means that the tempo change process is completed immediately or that the current tempo mode is a normal tempo mode in which the tempo change process is not performed. Jumps to the step 45 in FIG. 9 through the connector A, and outputs a value other than “0” (N
In the case of O), since the current timing corresponds to the bar line and the current tempo mode is the tempo change mode, the process goes to the next step 43 to stop the tempo change mode and return to the original tempo.

Step 43: Before entering the tempo change mode, the current performance tempo is returned to the previously stored performance tempo. Step 44: Reset the tempo change counter TCC to indicate that it is the normal tempo mode thereafter.

Step 45: Tempo mode change flag N
It is determined whether or not EXT is “0”, and “0” (YE
In the case of S), the process jumps to step 52; otherwise, in the case of "1" or "2" (NO), the next step 46
Proceed to. Step 46: The time for changing the tempo (for example, a value for two measures) is set as a predetermined value in the tempo change counter TCC.

Step 47: This time, it is determined whether or not the tempo mode change flag NEXT is "1".
In the case of (YES), the process proceeds to step 48; otherwise, the process proceeds to step 49 in the case of "2" (NO). Step 48: Set "1" to the tempo mode flag TMM to indicate that the subsequent tempo mode is the ritard mode. Step 49: Reset the tempo mode flag TMM to "0" to indicate that the tempo mode thereafter is the acceleland mode.

Step 50: tempo mode change flag N
EXT is reset to “0”. Step 51: The current tempo value, that is, the tempo immediately before the start of the tempo change process is stored in preparation for the next a-tempo process. Step 52: Set a pointer at the head of the normal pattern. That is, in this embodiment, the accompaniment pattern is a pattern for one measure, and is returned to the beginning at each measure line timing. Step 53: Set the timing counter COUNT to "0"
Reset to.

Next, operation examples of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 10 is a diagram showing the relationship between the bar line timing and the tempo when the fill-in switch 2B is operated at time tf after the bar line timing generation time t1. Until the fill-in switch 2B is operated at the time tf, the electronic musical instrument performs steps 31 to 33, 38 to 40, and 4 in FIGS.
5, 52 and 53 are repeated to execute a normal performance with a normal pattern.

When the fill-in switch 2B is operated at time tf, the fill-in processing shown in FIG. 4 is executed, and the address of the fill-in pattern corresponding to the operation time tf (current position) of the fill-in switch 2B is set in the pointer. During a period from time tf to time t2, steps 31 to 3 in FIGS.
While repeating 3, 38, and 39, a fill-in performance is performed using the fill-in pattern. When the time t2 is reached, steps 31 to 33, 38, 40 to 42, 45, 5
Steps 2 and 53 are executed, and the subsequent fill-in performance is stopped. After the bar timing at time t2, step 3 is performed again.
1 to 33, 38 to 40, 45, 52, and 53 are repeated to execute a normal performance with a normal pattern.

FIG. 11 shows a sync mode flag SYNC.
Is "0", the retard switch 2D is operated at a time tr before the bar line timing occurrence time t1, and the time t
FIG. 14 is a diagram showing a relationship between a bar timing and a tempo when the fill-in switch 2B is operated at a time tf after 1; In FIG. 11, until the ritard switch 2D is operated at the time tr, the electronic musical instrument performs steps 31 to 33, 3 in FIGS.
8 to 40, 45, 52 and 53 are repeated to execute a normal performance according to a normal pattern.

When the retard switch 2D is operated at the time tr, the retard process shown in FIG. 6 is executed. Since the synchro mode flag SYNC is “0”, the tempo change counter TCC is set to 2 in the retard processing.
The value of the bar is set, the tempo mode flag TMM is set to "1", and the current tempo value at the time tr is stored. During the period from time tr to time tf, the timer interrupt process is performed in steps 31 to 31 of FIGS.
36, 38 to 40, 45, 52, and 53 are repeatedly executed to perform a normal performance and a ritard-and-ditch process using a normal pattern.

When the fill-in switch 2B is operated at time tf, the fill-in process shown in FIG. 4 is executed, and the address of the fill-in pattern corresponding to the operation time tf (current position) of the fill-in switch 2B is set in the pointer. Steps 31 to 3 are performed from time tf to time t2.
6, 38, and 39 are performed, and the ritardand processing and the fill-in performance are performed in parallel. Then, when the time t2 is reached, steps 40 to 45, 52 and 53 are executed to terminate the fill-in performance and the ritard-and-play process and return to the performance tempo before the ritand-and-process. After the bar timing at time t2, steps 31 to 33, 38 to 40, 4
5, 52 and 53 are repeated to execute a normal performance with a normal pattern.

FIG. 12 shows a sync mode flag SYNC.
Is a diagram showing the relationship between the bar timing and the tempo when the fill-in switch 2B is operated at time tf and the ritard switch 2D is operated at time tr thereafter. Until the fill-in switch 2B is operated at the time tf, the electronic musical instrument performs steps 31 to 33, 38 to 40, and 4 in FIGS.
5, 52 and 53 are repeated to execute a normal performance with a normal pattern.

When the fill-in switch 2B is operated at time tf, the fill-in process shown in FIG. 4 is executed, and the address of the fill-in pattern corresponding to the operation time tf (current position) of the fill-in switch 2B is set in the pointer. During the period from time tf to time tr, the timer interrupt process is performed in steps 31 to 33, 3 of FIGS.
Steps 8 and 39 are repeated to execute a fill-in performance based on the fill-in pattern. When the retard switch 2D is operated at the time tr, the retard process of FIG. 6 is executed. Since the synchro mode flag SYNC is "0", the tempo change counter TC
The value of two measures is set in C, and the tempo mode flag T
“1” is set in MM, and the current tempo value at time tr is stored.

From time tr to time t2, step 3
The ritardand processing and the fill-in performance are performed in parallel by repeating steps 1 to 36, 38, and 39. Then, at time t2
Are reached, the steps 40 to 45, 52, and 53 are executed to terminate the fill-in performance and the ritard-and-play process, and return to the performance tempo before the ritard-and-play process. After the bar timing at time t2, steps 31 to 33, 3
8 to 40, 45, 52 and 53 are repeated to execute a normal performance according to a normal pattern.

FIG. 13 shows a sync mode flag SYNC.
Is a diagram showing the relationship between bar line timing and tempo when the ritard switch 2D is operated at time tr before the bar line timing generation time t1 and the fill-in switch 2B is operated at time tf thereafter. It is.
Until the retard switch 2D is operated at the time tr, the electronic musical instrument performs steps 31 to 33, 38 to 40, 45, 52, and 5 in FIGS.
3 is repeated to execute a normal performance with a normal pattern.

When the ritard switch 2D is operated at the time tr, the ritard process shown in FIG. 6 is executed. Since the synchro mode flag SYNC is “1”, the retard processing simply sets the tempo mode change flag NEXT to “1”. From time tr to time t1
Up to steps 31 to 3 in the timer interrupt processing.
The normal performance with the normal pattern is executed by repeating steps 3, 38 and 39. When the time t1 is reached, steps 38, 40, 45 to 4 are executed by the timer interrupt processing.
8. Perform steps 50-53. From time t1 to time tf, steps 31 to 36, 38, and 39 are repeated, and the normal performance using the normal pattern and the ritard processing are performed in parallel.

When the fill-in switch 2B is operated at time tf, the fill-in processing shown in FIG. 4 is executed, and the address of the fill-in pattern corresponding to the operation time tf (current position) of the fill-in switch 2B is set in the pointer. Steps 31 to 3 are performed from time tf to time t2.
Steps 6, 38 and 39 are executed, and the fill-in performance by the fill-in pattern and the ritard processing are performed in parallel. When the time t2 is reached, steps 40 to 45, 52, 5
Step 3 is executed to end the fill-in performance and the ritard-and-play process and return to the performance tempo before the ritard-and-play process. After the bar line timing at time t2, steps 31 to
33, 38 to 40, 45, 52 and 53 are repeated to execute a normal performance according to a normal pattern.

FIG. 14 shows the sync mode flag SYNC.
Is a diagram showing the relationship between bar line timing and tempo when the ritard switch 2D is operated at a time trs before the bar line timing generation time t1.
Until the retard switch 2D is operated at the time tr, the electronic musical instrument performs the timer interrupt processing in step 3
1 to 33, 38 to 40, 45, 52 and 53 are repeated to execute a normal performance according to a normal pattern.

When the retard switch 2D is operated at the time trs, the ritard process shown in FIG. 6 is executed. Since the synchro mode flag SYNC is “0”, the tempo change counter TCC is set to 2 in the retard processing.
The value for the bar is set, the tempo mode flag TMM is set to "1", and the current tempo value at the time trs is stored. From time trs to time tr, steps 31 to 36, 38 to 40,
45, 52, and 53 are repeated to perform the ritardando processing. Time tre when the ritardando processing for two measures ends
Then, since the value of the tempo change counter TCC becomes "0", steps 34 to 37 are not executed, and the ritard-done processing ends. Then, after time tre, steps 31 to 33, 38 to 40, 45, 52, and 53 are repeated to execute a normal performance according to the normal pattern at the performance tempo at the end of the ritard processing.

In the above embodiment, steps 34 to 3 in FIG.
As shown in FIG. 7, the ritardando processing (tempo-down processing) and the accelerando processing (tempo-up processing) are performed for each timer interrupt processing (for each minimum resolution of automatic performance). Good. That is, each time the decremental process of step 34 is performed a plurality of times, the processes of steps 35 to 37 are performed. Further, in the above-described embodiment, a case has been described in which instructions such as fill-in and ritard processing are instructed in real time by manual operation.However, the present invention is not limited to this.
Fill-in may be performed automatically, or ritard processing may be performed.

[0058] As described above, in the above embodiment, the processing of steps 42 to 44, performed only tempo restoration process if the fill-play is completed in the middle of rit processing or accelerando process, rit treatment during the fill-performance Alternatively, it is not performed when the accelerand processing is completed. That is, for example, as shown in FIG.
NC is “0” and the ritard switch 2 at time trs
If the D is operated, the fill-in switch 2B is operated at the subsequent time tf, and the ritardando processing for two measures is completed at the time tr before the time t3 at which the subsequent bar line timing occurs, the tempo return processing is not performed. It has become . Also, the tempo change processing for changing the performance tempo such as ritardand processing and acceleland processing and the pattern change processing for changing the performance pattern from a normal pattern to a sub-pattern such as fill-in performance are executed separately without any synchronization. A selectable asynchronous selection switch may be further provided to enable the selection.

[0059]

As described above, according to the present invention, tempo change processing for changing the performance tempo such as ritardando processing or accelerand processing, and performance pattern change from a normal pattern to a sub-pattern such as fill-in performance There is an effect that the pattern changing process to be performed can be executed separately or in synchronization. Also changes the speed of the tempo signal
Processing to return to the speed of the previous tempo signal (tempo return processing
Is performed at the end of the performance of the sub-pattern
This does not mean that the temp
Automatically depending on whether or not the
The tempo change process to change the pattern
Performer can be automatically synchronized with the process
Automatic tempo change control that prioritizes
It has an excellent effect that it can be performed. That is, the sub
Tempo change control has been completed before the performance of the pattern ends
If the current tempo is already stable,
Desired by the performer by operating the
Of the current tempo
To the original tempo before the change process.
It is configured as follows. This allows the performer to
Point change control is linked to sub pattern change control
Tempo change control (reset) without worrying about
Easy use of redundant processing and acceleland processing)
can do. Also, this allows the performance expression range
Can also be extended.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a hardware configuration example of an embodiment of an electronic musical instrument to which an automatic performance device according to the present invention is applied.

FIG. 2 is a flowchart illustrating an example of a main routine processed by the microcomputer in FIG. 1;

FIG. 3 is a flowchart illustrating an example of a start / stop process in the corresponding switch process of FIG. 2;

FIG. 4 is a flowchart illustrating an example of a fill-in process in the corresponding switch process of FIG. 2;

FIG. 5 is a flowchart illustrating an example of a synchronization process in the corresponding switch process of FIG. 2;

FIG. 6 is a flowchart illustrating an example of a ritardand process in the corresponding switch process of FIG. 2;

FIG. 7 is a flowchart illustrating an example of an accelerand process in the corresponding switch process of FIG. 2;

8 is a flowchart showing a first half of a timer interrupt process executed each time the CPU of FIG. 1 inputs an interrupt command from a timer.

9 is a flowchart showing a latter half of a timer interrupt process executed each time the CPU of FIG. 1 inputs an interrupt command from a timer.

FIG. 10 shows that the synchro mode flag SYNC is “0”
FIG. 9 is a diagram showing the relationship between the bar timing and the tempo when the fill-in switch is operated after the occurrence time of the bar timing.

FIG. 11 shows that the synchro mode flag SYNC is “0”
FIG. 8 is a diagram showing the relationship between bar line timing and tempo when the ritard switch is operated before the bar line timing occurs and the fill-in switch is operated after that.

FIG. 12 shows that the synchro mode flag SYNC is “0”
FIG. 8 is a diagram showing the relationship between bar line timing and tempo when a fill-in switch is operated and then a retard switch is operated.

FIG. 13 shows that the synchro mode flag SYNC is “1”
FIG. 8 is a diagram showing the relationship between bar line timing and tempo when the ritard switch is operated before the bar line timing occurs and the fill-in switch is operated after that.

FIG. 14 shows that the sync mode flag SYNC is “0”
FIG. 9 is a diagram showing the relationship between the bar timing and the tempo when the ritard switch is operated before the time at which the bar timing occurs.

FIG. 15 shows that the synchro mode flag SYNC is “0”
FIG. 9 is a diagram showing the relationship between the bar timing and the tempo when the ritard switch is operated before the time at which the bar timing occurs.

[Explanation of symbols]

10 CPU, 11 Program ROM, 12 Data and Working RAM, 13 Key press / release detection circuit, 14
Switch detection circuit, 15 display circuit, 16 sound source circuit,
17 ... timer, 18 ... data and address bus, 19 ...
Keyboard, 20 panel switch, 21 display unit, 22 sound system, 2A start / stop switch,
2B: Fill-in switch, 2C: Synchro switch,
2D: Rital dand switch, 2E: Accelerand switch, 2F: Tempo up switch, 2G: Tempo down switch

Claims (1)

(57) [Claims] 1. A performance pattern storage means for storing a plurality of main patterns and a plurality of sub-patterns, and temporarily inserting an automatic performance according to the sub-pattern during the automatic performance according to the main pattern. Pattern change instructing means for instructing; tempo signal generating means for generating a tempo signal; tempo change instructing means for instructing to change the speed of the tempo signal; and tempo signal in accordance with an instruction from the tempo change instructing means. Change the speed of the tempo signal generated by the generation means
Tempo change control means for gradually changing to a predetermined speed at a rate ; reading the main pattern from the performance pattern storage means; performing an automatic performance according to the read main pattern at a tempo according to the tempo signal; Reading the sub-pattern from the performance pattern storage means in accordance with an instruction from the pattern change instructing means, and performing an automatic performance according to the read sub-pattern in accordance with the tempo signal.
Control means for temporarily performing at the tempo, automatically performing the automatic performance according to the main pattern again at the tempo according to the tempo signal after completion of the automatic performance by the sub-pattern, and performing automatic performance processing of the sub-pattern by the control means. In a case where the tempo change control means executes the tempo signal change processing at the same time, if the tempo change control is not completed at the end of the performance of the sub-pattern, it is synchronized with the end of the automatic performance processing of the sub-pattern. Then, a process of returning the speed of the tempo signal to the original speed of the tempo signal before the change process is performed, and if the tempo change control is completed at the end of the performance of the sub-pattern, the current tempo signal is changed. An automatic performance device comprising: a tempo return means for maintaining the tempo.